There are two problems here:

1. GC didn't work properly in PP-2010, so results were mediocre at best when this new feature was introduced.

2. GC is not enabled in Poser 9, so while "pro"-users can tick a box, hobbyist users are expected to manually add complicated auto-GC shader algorithms to each and any material in their scene.

 

It would be better if the differences between Poser 10 and PP-2014(?) would be about content creation, not render quality and speed, otherwise merchants will always settle for the "lower" standard.